question What is the term for the region in an atom where an electron is likely to be found

Chemistry

What is the term for the region in an atom where an electron is likely to be found?

A. Electron cloud
B. Orbital
C. Nucleus
D. Energy level

The electron cloud represents the probable location of an electron.

Which functional group is present in a carboxylic acid?

A. Carboxyl (-COOH)
B. Carbonyl (C=O)
C. Hydroxyl (-OH)
D. Ester (-COO-)

Which process involves the breakdown of glucose to produce ATP in the absence of oxygen?

A. Anaerobic glycolysis
B. Citric acid cycle
C. Electron transport chain
D. Oxidative phosphorylation

The enthalpy change in a chemical reaction at constant pressure (ΔH) is related to the internal energy change (ΔU) and pressure change (ΔP) by:

A. ΔH = ΔU + ΔP
B. ΔH = ΔU + PΔV
C. ΔH = ΔU - PΔV
D. ΔH = ΔU/ΔP

What is the product of the reaction between nitric acid (HNO₃) and potassium hydroxide (KOH)?

A. Potassium nitrate and water
B. Nitrogen gas and oxygen gas
C. Potassium hydroxide and water
D. Potassium nitrite and water

In thermodynamics, the term "adiabatic" refers to a process without:

A. Heat exchange
B. Pressure change
C. Volume change
D. Temperature change

Which quantum number distinguishes between different orbitals of the same energy level?

A. Magnetic
B. Principal
C. Azimuthal
D. Spin

The Joule-Thomson effect describes the change in temperature of a gas during:

A. Isobaric expansion
B. Isothermal compression
C. Adiabatic process
D. Isenthalpic process

In the periodic table, the actinides are located in which period?

A. Period 7
B. Period 6
C. Period 5
D. Period 7

What is the IUPAC name for CH₃COCH₃?

A. Acetone
B. Propanone
C. Butanone
D. Ethanal

The electron affinity of an atom is a measure of its tendency to:

A. Gain electrons
B. Lose electrons
C. Form ions
D. Bond with other atoms